Hydroxyethylcellulose (HEC) ndi polima ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo zodzoladzola, mankhwala, ndi chakudya. Ndizochokera ku cellulose yosinthidwa yomwe imachokera ku cellulose yachilengedwe, polysaccharide yomwe imapezeka m'makoma a cellulose. Gulu losunthikali limapangidwa kudzera munjira yosinthira mankhwala omwe amaphatikizana ndi cellulose ndi ethylene oxide kuti apangitse magulu a hydroxyethyl pamsana wa cellulose. The chifukwa hydroxyethylcellulose ali ndi katundu rheological wapadera, kupangitsa kukhala ofunika mu osiyanasiyana ntchito.
Cellulose, gwero loyambira la hydroxyethylcellulose, ndi lochuluka mwachilengedwe ndipo limapezeka kuzinthu zosiyanasiyana. Magwero ambiri a cellulose ndi matabwa, thonje, hemp, ndi zomera zina za fibrous. Kutulutsa kwa cellulose nthawi zambiri kumaphatikizapo kuphwanya mbewuyo kudzera m'makina kapena mankhwala kuti mulekanitse ulusi wa cellulose. Akatalikidwa, cellulose amakonzedwanso kuti achotse zonyansa ndikuzikonzekera kuti zisinthidwe.
The synthesis wa hydroxyethylcellulose kumafuna zimene mapadi ndi ethylene okusayidi pansi ankalamulira zinthu. Ethylene oxide ndi organic pawiri ndi mankhwala chilinganizo C2H4O, ambiri ntchito kupanga zosiyanasiyana mafakitale mankhwala. Mukachita ndi cellulose, ethylene oxide imawonjezera magulu a hydroxyethyl (-OHCH2CH2) pamsana wa cellulose, zomwe zimapangitsa kuti hydroxyethyl cellulose ipangidwe. Mlingo wolowa m'malo, womwe umatanthawuza kuchuluka kwa magulu a hydroxyethyl omwe amawonjezedwa pagawo la shuga mu unyolo wa cellulose, amatha kuwongoleredwa panthawi ya kaphatikizidwe kuti agwirizane ndi zomwe zimapangidwa pomaliza.
Kusintha kwa mankhwala a cellulose kuti apange hydroxyethylcellulose kumapereka zinthu zingapo zabwino kwa polima. Zinthuzi zikuphatikiza kusungunuka kwamadzi, kukhathamiritsa kwabwino komanso kuthekera kwa gelling, kukhazikika kokhazikika pamitundu yosiyanasiyana ya pH ndi kutentha, komanso kuyanjana ndi zinthu zina zosiyanasiyana zomwe zimagwiritsidwa ntchito popanga. Izi zimapangitsa hydroxyethylcellulose kukhala chowonjezera chosunthika chokhala ndi ntchito zambiri m'mafakitale osiyanasiyana.
M'makampani opanga zodzoladzola, hydroxyethylcellulose amagwiritsidwa ntchito kwambiri ngati thickening agent, stabilizer, ndi emulsifier muzinthu zosiyanasiyana zosamalira anthu monga ma shampoos, zowongolera, mafuta odzola, mafuta opaka, ma gels. Kutha kwake kusintha mamasukidwe akayendedwe ndi kapangidwe ka formulations amalola kulenga zinthu ndi zofunika zomverera makhalidwe ndi ntchito makhalidwe. Kuphatikiza apo, hydroxyethylcellulose imatha kukhala ngati wopangira filimu, kupereka chotchinga pakhungu kapena tsitsi.
Popanga mankhwala, hydroxyethylcellulose imagwiritsidwa ntchito ngati chomangira pakupanga mapiritsi, komwe imathandizira kuti zinthu zizikhala pamodzi ndikuwongolera mphamvu zamakina a mapiritsi. Amagwiritsidwanso ntchito ngati suspending wothandizira mu madzi formulations kuteteza yokhazikika a particles olimba ndi kuonetsetsa yunifolomu kufalitsa yogwira zosakaniza. Komanso, hydroxyethylcellulose amagwira ntchito ngati mamasukidwe akayendedwe modifier mu ophthalmic njira ndi gel osakaniza apakhungu, utithandize mafuta awo katundu ndi kutalikitsa amakhala nthawi pamwamba ocular kapena khungu.
M'makampani azakudya, hydroxyethylcellulose amapeza ntchito ngati thickener, stabilizer, ndi gelling wothandizira muzakudya zosiyanasiyana, kuphatikiza sosi, mavalidwe, zokometsera, ndi zakumwa. Itha kuwongolera kapangidwe kake, kamvekedwe ka mkamwa, ndi kukhazikika kwa shelufu yazakudya popanda kusokoneza kukoma kapena fungo lake. Hydroxyethylcellulose nthawi zambiri imadziwika kuti ndi yotetezeka (GRAS) kuti igwiritsidwe ntchito m'zakudya ndi maulamuliro monga US Food and Drug Administration (FDA) ndi European Food Safety Authority (EFSA).
hydroxyethylcellulose ndi chinthu chamtengo wapatali chochokera ku cellulose yochokera kuzinthu zachilengedwe za cellulose kudzera mukusintha kwamankhwala ndi ethylene oxide. Mawonekedwe ake apadera a rheological amapangitsa kuti ikhale yowonjezera yosinthika muzodzola, mankhwala, ndi zakudya, komwe imagwira ntchito ngati thickener, stabilizer, binder, emulsifier, ndi gelling agent. Ndi ntchito zake zambiri komanso mbiri yabwino yachitetezo, hydroxyethylcellulose ikupitilizabe kukhala chinthu chofunikira pakupanga kosiyanasiyana kwa ogula ndi mafakitale.
Nthawi yotumiza: Apr-12-2024